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Describe about Object oriented design
Object oriented design is concerned with developing an object oriented model of a software system to implement known requirements. Many OOD methods have been described since late 1980s. The most famous OOD methods include Wasserman, Buhr, Booch, and HOOD developed by the European Space Agency which can give following benefits: maintainability through simplified mapping to problem domain that provides for less analysis effort, less complexity in system design and easier verification by user.
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
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Explain the function of Object model Object model describes the classes of objects in system, including their attributes and operations which they support. The analysis object
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